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  <a name="EN-US_TOPIC_0000001792358126"></a><a name="EN-US_TOPIC_0000001792358126"></a>
  <h1 class="topictitle1">Creating a Periodic Backup</h1>
  <div>
   <p>After resources to be protected are associated with an SLA, the system protects the resources based on the SLA.</p>
   <div class="section">
    <h4 class="sectiontitle">Procedure</h4>
    <ol>
     <li><span>Choose <span class="uicontrol" id="EN-US_TOPIC_0000001792358126__en-us_topic_0000001839142377_uicontrol1138252616373"><b><span id="EN-US_TOPIC_0000001792358126__en-us_topic_0000001839142377_text73821261375"><strong>Protection</strong></span> &gt; Databases &gt; Informix</b></span>.</span></li>
     <li><span>On the <span class="uicontrol"><b>Instance</b></span> tab, select the database to be protected and choose <span class="uicontrol"><b><span><strong>More</strong></span> &gt; <span><strong>Protect</strong></span></b></span>. </span><p></p><p>You can also select multiple databases for batch protection.</p> <p></p></li>
     <li><span>Select an SLA. </span><p></p><p>You can also click <span class="uicontrol"><b><span><strong>Create</strong></span></b></span> to create an SLA.</p> <p></p></li>
     <li><span>Set advanced parameters for the backup policy. </span><p></p>
      <div class="p">
       <a href="#EN-US_TOPIC_0000001792358126__en-us_topic_0000001349147581_en-us_topic_0000001263775382_table354613271506">Table 1</a> describes the related parameters. 
       <div class="tablenoborder">
        <a name="EN-US_TOPIC_0000001792358126__en-us_topic_0000001349147581_en-us_topic_0000001263775382_table354613271506"></a><a name="en-us_topic_0000001349147581_en-us_topic_0000001263775382_table354613271506"></a>
        <table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000001792358126__en-us_topic_0000001349147581_en-us_topic_0000001263775382_table354613271506" frame="border" border="1" rules="all">
         <caption>
          <b>Table 1 </b>Advanced parameters of a backup policy
         </caption>
         <colgroup>
          <col style="width:30.06%">
          <col style="width:69.94%">
         </colgroup>
         <thead align="left">
          <tr>
           <th align="left" class="cellrowborder" valign="top" width="30.06%" id="mcps1.3.2.2.4.2.1.2.2.3.1.1"><p>Parameter</p></th>
           <th align="left" class="cellrowborder" valign="top" width="69.94%" id="mcps1.3.2.2.4.2.1.2.2.3.1.2"><p>Description</p></th>
          </tr>
         </thead>
         <tbody>
          <tr>
           <td class="cellrowborder" valign="top" width="30.06%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.1 "><p><span><strong>Rate Limiting Policies</strong></span></p></td>
           <td class="cellrowborder" valign="top" width="69.94%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.2 "><p>Average maximum amount of data that can be transmitted per second in a backup job.</p></td>
          </tr>
          <tr>
           <td class="cellrowborder" valign="top" width="30.06%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.1 "><p><span><strong>Source Deduplication</strong></span></p></td>
           <td class="cellrowborder" valign="top" width="69.94%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.2 ">
            <div class="p">
             After this function is enabled, the amount of data to be transmitted can be reduced, but more client resources will be occupied.
             <div class="note" id="EN-US_TOPIC_0000001792358126__en-us_topic_0000001839143189_note8885112682911">
              <span class="notetitle"> NOTE: </span>
              <div class="notebody">
               <ul id="EN-US_TOPIC_0000001792358126__en-us_topic_0000001839143189_ul5885426132914">
                <li id="EN-US_TOPIC_0000001792358126__en-us_topic_0000001839143189_li10885172616299">An agent host can only be linked with one storage unit. To enable source deduplication, select <span class="parmvalue" id="EN-US_TOPIC_0000001792358126__en-us_topic_0000001839143189_parmvalue13417617181719"><b>Backup Storage Unit</b></span> for <span class="parmname" id="EN-US_TOPIC_0000001792358126__en-us_topic_0000001839143189_parmname164341313131719"><b>Specify Target Location</b></span>. Otherwise, a storage unit that is not linked with the agent host may be selected through intelligent balancing. As a result, source deduplication fails to be enabled. If different protected objects are associated with different SLAs, where different backup storage units are specified, select different agent hosts for the protected objects. Otherwise, source deduplication of some backup jobs will fail to be enabled.</li>
                <li id="EN-US_TOPIC_0000001792358126__en-us_topic_0000001839143189_li9885182662911">If an agent host has been linked with a storage unit but is not performing a backup job with source deduplication, you can run the <strong id="EN-US_TOPIC_0000001792358126__en-us_topic_0000001839143189_b1734071915190">dataturbo delete storage_object storage_name=</strong><em id="EN-US_TOPIC_0000001792358126__en-us_topic_0000001839143189_i18291255102216">?</em> command on the agent host to delete the source deduplication link with the storage unit. The value of <strong id="EN-US_TOPIC_0000001792358126__en-us_topic_0000001839143189_b9927131312572">storage_name</strong> in the command can be queried by running the <strong id="EN-US_TOPIC_0000001792358126__en-us_topic_0000001839143189_b11782052162315">dataturbo show storage_object</strong> command. This way, when the agent host performs a backup job with source deduplication, the link between the agent host and a new storage unit can be established.</li>
                <li id="EN-US_TOPIC_0000001792358126__en-us_topic_0000001839143189_li11885142615297">Check whether the host OS supports source deduplication by referring to <a href="https://info.support.huawei.com/storage/comp/#/oceanprotect" target="_blank" rel="noopener noreferrer">Compatibility Query</a>. If the host OS does not support source deduplication, source deduplication does not take effect.</li>
                <li id="EN-US_TOPIC_0000001792358126__en-us_topic_0000001839143189_li7883549153219">If a built-in agent is used for backup, source deduplication, after being configured, does not take effect.</li>
               </ul>
              </div>
             </div>
            </div></td>
          </tr>
          <tr>
           <td class="cellrowborder" valign="top" width="30.06%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.1 "><p><span><strong>Job Failure Alarm</strong></span></p></td>
           <td class="cellrowborder" valign="top" width="69.94%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.2 "><p>After this function is enabled, an alarm is automatically sent if a job fails and is automatically cleared after successful execution.</p></td>
          </tr>
          <tr>
           <td class="cellrowborder" valign="top" width="30.06%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.1 "><p><span><strong>Automatic Retry</strong></span></p></td>
           <td class="cellrowborder" valign="top" width="69.94%" headers="mcps1.3.2.2.4.2.1.2.2.3.1.2 "><p>After this function is enabled, the system automatically retries a backup job if it fails.</p>
            <div class="p">
             The number of retries ranges from 1 to 5, and the wait time ranges from 1 to 30 minutes. For example, if the number of retries is set to 3 and the wait time to 5 minutes, the system makes 3 retries and each retry every 5 minutes.
             <div class="note">
              <span class="notetitle"> NOTE: </span>
              <div class="notebody">
               <p>During automatic retry, the system creates a backup job. If the backup job is not within the backup time window, the job is not executed and fails.</p>
              </div>
             </div>
            </div></td>
          </tr>
         </tbody>
        </table>
       </div>
      </div> <p></p></li>
     <li><span>Click <span class="uicontrol"><b>OK</b></span>. </span><p></p><p>If the current system time is later than the start time of the first backup set in the SLA, you can choose to perform the backup immediately or wait for the next scheduling based on the backup policy set in the SLA after the backup SLA is associated with the resource.</p> <p></p></li>
    </ol>
   </div>
  </div>
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   <div class="familylinks">
    <div class="parentlink">
     <strong>Parent topic:</strong> <a href="en-us_topic_0000001792358006.html">Step 7: Performing Backup</a>
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